Fenton. COD ρ NH N TP ENVIRONMENTAL PROTECTION OF CHEMICAL INDUSTRY

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Ιώ Ελευθερόπουλος
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1 COD TP DB32/ Fenton ph 3.~3.5 H 2 O ml/l FeSO 4 H 2 O.8 g/l1 min Fenton ph km 3 /d Fenton H 2 O 2 15 L/h FeSO 4 7H 2 O 7 L/h COD TP mg/l.4 mg/l.9 X73 A Research Institute of Environmental Engineering East China University of Science and Technology Shanghai 237 China Abstract: Fenton oxidation process was applied for an upgrading project of centralized sewage treatment plant of a chemical industrial park in Jiangsu because its effluent COD and TP were higher than the emission limits specified by Jiangsu provincial discharge standard DB32/ The optimum process conditions obtained through bench test are as follows initial wastewater ph H 2 O 2 w 3 dosage.8 ml/l FeSO 4 H 2 O dosage.8 g/l reaction time 1 min suitable ph for neutralization after Fenton oxidation 7.. The upgrading project includes two sets of Fenton oxidation system operating in parallel and the treatment capacity of each set is 1 km 3 /d. After project commissioning and when the dosages of H 2 O 2 and FeSO 4 H 2 O solution are controlled at 15 L/h and 7 L/h COD and TP of the treated effluent are stable below mg/l and.4 mg/l respectively which can meet the discharge standard. The chemical cost of wastewater treatments is about RMB.9 per ton. Key words: Fenton oxidation chemical industrial park centralized sewage treatment plant ferrous sulfate hydrogen peroxide COD ρ NH N TP GB gmcao@ecust.edu.cn

2 GB AB COD GB mg/l GB A mg/l B mg/l 1 km /dcod mg/l ρ NH N mg/l TP mg/l SS mg/l ph= ~ COD mg/l ρ NH N mg/l TP mg/l SS mg/l ph= ~ A/O ρ NH N SS phcod TP GB DB / COD mg/l ρ NH N mg/l TP. mg/l SS mg/l ph= ~ 2 COD BOD mg/l COD PO HPO H PO H PO TP TP TP A/O Fe + Al + FePO AlPO TP kt COD TP FentonO H O O OH O H O UV O UV UV TiO O H O UV FentonO FentonO COD= mg/l TP=. mg/l FentonFeSO H O g/l H O ml/l ph. min Fenton COD= mg/l TP=. mg/l O O mg/l O L/ L min ph. min O COD= mg/l TP=. mg/l Fenton 3 ml ph FeSO H O

3 . Fenton H O Fenton NaOHpH hcod TP COD TP.. ph FeSO H O. g/l H O. ml/l min ph COD ph COD ph. ph COD ph. ~. Haber Weiss FentonH O H O + Fe + Fe + + OH + OH Fe + + OH Fe + + OH Fe + + H O Fe + +H + + HO ph OHpH Fe + Fe OH ph Fe + Fe + Fe + OH COD ph 1 ph COD OH Fe + Fe + Fe + OH H O COD FeSO H O FeSO H O. g/l FeSO H O TP TP Fenton Fe + FePO Fe + P FeSO H O TP FeSO 4 7H 2 Omg L 1 2 FeSO 4 7H 2 O COD TP.. H O COD TP FeSO H O. g/lph. minh O COD.. FeSO H O ph. H O. ml/ L minfeso H O COD TP FeSO H O COD FeSO H O. g/l FeSO H O COD Fe + COD H 2 O 2 mg L 1 3 H 2 O 2 COD

4 H O COD H O. ml/l COD.COD mg/l H O. ml/l.. FeSO H O. g/lph. H O. ml/l COD COD OH H O min COD min COD min Fe OH OH PO Fe + Fenton NaOH ph. TPpH ph 5 ph COD TP COD TP COD COD.. ph COD TP Fenton Fenton ph Fe + ph ph. ph ph NaOH ph COD TP ph COD TP ph TP ph.tp. TP. mg/l OH Fe + 3 Fenton ph Fenton m km /d Fenton m /hph.. H O L/h FeSO H O L/h ph.. FentonCOD TPCOD mg/l TP. mg/l COD TP H O FeSO H O H O L/h FeSO H O L/h COD TP mg/l. mg/l COD CODCOD mg/l H O H O COD H O FeSO H O NaOH

5 . Fenton. 4 afenton COD TP bph. ~. H O. ml/l FeSO H O. g/l min Fenton ph. c km /d Fenton H O L/h FeSO H O L/h COD TP mg/l. mg/l. 1. GB S GB S DB 32/939 6 S APHA. Standard Methods for the Examination of Water and Wastewater M. Washington DC APHA Metcalf & Eddy. Wastewater Engineering Treatment and Resource Recovery M. New York McGraw- Hill J J Joseph J Esther O Allison M et al. Advanced Oxidation Processes for Organic Contaminant Destruction Based on the Fenton Reaction and Related Chemistry J. Critical Rev Environ Sci Technol Ghatak H R. Advanced Oxidation Processes for the Treatment of Biorecalcitrant Organics in Wastewater J. Critical Rev Environ Sci Technol Oturan M A Aaron J J. Advanced Oxidation Processes in Water/Wastewater Treatment Principles and Applications. A Review J. Critical Rev Environ Sci Technol Chung J Kim J O. Application of Advanced Oxidation Processes to Remove Refractory Compounds from Dye Wastewater J. Desalination Water Treat /2/ HJ/T S Haber F Weiss J. The Catalytic Decomposition of Hydrogen Peroxide by Iron Salt J. Mathe Phys Sci Pignatello J J. Dark and Photoassisted Fe 3+ -Catalyzed Degradation of Chlorophenoxy Herbicides by Hydrogen Peroxide J. Environ Sci Technol SinceroA P Sincero G A. Physical-Chemical Treatment of Water and Wastewater M. New York CRC Press Me x V O Mex.. /CN A

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